package com.ssm.interceptor;

import com.ssm.entity.SysUser;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {

        HttpSession session=httpServletRequest.getSession();
        SysUser userInfo= (SysUser) session.getAttribute("sysUser");
        System.out.println(userInfo);
        if (userInfo==null){
            System.out.println("身份拦截器启动");

            httpServletRequest.setAttribute("message","you are not login");
            httpServletRequest.getRequestDispatcher("/index").forward(httpServletRequest,httpServletResponse);
            return false;
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }
}
